Failed to mount component: template or render function not defined

[watsab]

Hi ! I'm facing an issue and don't know how to solve it... I'm using Encore to build all the assets, including Vue.js components. Below is the devDependencies of my package.json: "devDependencies":

    {
        "@symfony/webpack-encore": "^1.6.1",
        "bootstrap": "4.4.1",
        "core-js": "^3.0.0",
        "file-loader": "^6.0.0",
        "regenerator-runtime": "^0.13.2",
        "sass-loader": "^10.2.0",
        "vue": "^2.5",
        "vue-loader": "^15.9.5",
        "vue-template-compiler": "^2.6.14",
        "webpack-notifier": "^1.6.0"
    },

And here is my webpack.config.js

Encore
    // directory where compiled assets will be stored
    .addPlugin(
        new webpack.IgnorePlugin({
            resourceRegExp: /^\.\/locale$/,
            contextRegExp: /sonatacore\/vendor\/moment/,
        })
    )
    .setOutputPath('public/build/')
    // public path used by the web server to access the output path
    .setPublicPath('/build')
    .cleanupOutputBeforeBuild()
    .enableSourceMaps(!Encore.isProduction())

    .copyFiles({
        from: './assets/images',
        to: 'images/[path][name].[ext]',
    })

    // only needed for CDN's or sub-directory deploy
    //.setManifestKeyPrefix('build/')
    // .autoProvidejQuery()
    /*
     * ENTRY CONFIG
     *
     * Add 1 entry for each "page" of your app
     * (including one that's included on every page - e.g. "app")
     *
     * Each entry will result in one JavaScript file (e.g. app.js)
     * and one CSS file (e.g. app.css) if your JavaScript imports CSS.
     */

    .addStyleEntry('css/main', './assets/css/main.scss')

    .addStyleEntry('css/customAdmin', './assets/css/admin/customAdmin.scss')

    .addEntry('js/app', './assets/js/app.js')

    // will require an extra script tag for runtime.js
    // but, you probably want this, unless you're building a single-page app
    .enableSingleRuntimeChunk()
    /*
     * FEATURE CONFIG
     *
     * Enable & configure other features below. For a full
     * list of features, see:
     * https://symfony.com/doc/current/frontend.html#adding-more-features
     */
    .cleanupOutputBeforeBuild()
    .enableBuildNotifications()
    .enableSourceMaps(!Encore.isProduction())
    // enables hashed filenames (e.g. app.abc123.css)
    .enableVersioning()

    // enables @babel/preset-env polyfills
    .configureBabelPresetEnv((config) => {
        config.useBuiltIns = 'usage'
        config.corejs = 3
    })

    // enables Sass/SCSS support
    // Add base scss to all files so they are available everywhere
    .enableSassLoader((options) => options.additionalData = `@import "${path.resolve(__dirname, './assets/css/base.scss')}";`)

    //enable VueJS
    .enableVueLoader(
        () => {},
        {runtimeCompilerBuild: false}
    )

    .addRule({
        test: /\.vue$/,
        loader: 'vue-loader'
    })

    .addAliases({
        'vue$': 'vue/dist/vue.esm.js'
    })

In my app.js file, the different Vue instances are initialised:

Vue.component('GeoDecisionMap', () => import('../components/geoDecision/GeoDecisionMap'))
Vue.component('DropdownCheckbox', () => import('../components/form/core/DropdownCheckbox'))
Vue.component('ChoiceClientModal', () => import('../components/modal/ChoiceClientModal'))

const vueContainers = document.getElementsByClassName('vue-container')
const vueContainersCount = vueContainers.length
if (vueContainersCount > 0) {
    for (let i = 0; i < vueContainersCount; i++) {
      new Vue({el: vueContainers[i]})
    }
}

When launching the build (encore dev) everything seems to be working fine, the build is successful. However, when I access the page including the Vue components, it is not working : the component is not showing and I have an error in my browser console

vue.esm.js:628 [Vue warn]: Failed to mount component: template or render function not defined.

found in

---> <GeoDecisionMap> at assets/components/geoDecision/GeoDecisionMap.vue
       <Root>

Has anyone else faced this ? What am I doing wrong ? Thanks

[carsonbot]

Thank you for this issue. There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Thank you for this issue. There has not been a lot of activity here for a while. Has this been resolved?

[carsonbot]

Friendly ping? Should this still be open? I will close if I don't hear anything.

[carsonbot]

Hey,

I didn't hear anything so I'm going to close it. Feel free to comment if this is still relevant, I can always reopen!